Temperature Converter
Convert Celsius (°C), Fahrenheit (°F), and Kelvin (K) in real time on one screen
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
Convert between Celsius (°C), Fahrenheit (°F), and Kelvin in real time, all on one screen. Type a value into any field and the other two units are calculated instantly, so you can quickly convert overseas weather, cooking temperatures, and scientific figures.
How to use
- Enter a value you know into any of the Celsius, Fahrenheit, or Kelvin fields.
- The other two units convert automatically in real time.
- You can also tap buttons like water's freezing point, body temperature, or boiling point to insert a reference temperature instantly.
- If needed, clear the value and re-enter it based on a different unit.
FAQ
- What are the Fahrenheit and Celsius conversion formulas?
- °F = °C × 9/5 + 32, and conversely °C = (°F − 32) × 5/9. Kelvin is K = °C + 273.15, which adds the absolute-zero offset to Celsius.
- What happens if I enter a negative Kelvin value?
- 0 K (−273.15 °C) is absolute zero, and no temperature can physically be lower. If you enter a negative Kelvin value it will still be calculated, but a notice will prompt you to double-check the value.
- Are the values I enter sent to a server?
- No. All conversions are calculated instantly within your browser, and your inputs are never transmitted to or stored on a server.